Fidelity Electronics 19eA - 4 Power & Connections; Power Adaptor; Built-In Rechargeable Battery; Connect with Weighing Platform or Load Cell Junction Box

4. Power & Connections
4.1 Power Adaptor
Always use the power adaptor supplied together with this instrument to avoid un-recoverable damages to this instrument.
4.2 Built-In Rechargeable Battery
Before first time use, recharge the built-in batter for at least 8 hours to ensure the best battery performance.
4.3 Connect
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with Weighing Platform or Load Cell Junction Box
Connect this instrument with a weighing platform (load cell) through load cell connector located at the back according
to the below pin assignment table.
Note: - If a 4-wire load cell or junction box is used, short-circuit pin 1&2 and pin 3&4. Otherwise, this instrument will not
work.
4.3.1 Load cell connector pin assignment
Pin # on
Load Cell Connector
Pin Assignment
1
Excitation +ve
2
Remote Sense +ve
3
Excitation -ve
4
Remote Sense -ve
5
Signal +ve
6
Signal -ve
7
Ground
4.4 Comports on Instrument
There are 2 built-in comports on this instrument. Both comports support bi-directional communication when set as PC
and CMD modes. Refer to 5.5 for setting details.
4.5 Comports Pin Assignment
Refer to below table for pin assignment between this instrument and a computer or serial printer.
Comport pin assignment on instrument
Notes: -
 Comport 1 is assigned as DTE and has a male connector.
 Comport 2 is assigned as DCE and has a female connector.
10
Turn this instrument off and unplug power adaptor before making any connection or disconnection.
Comport 1 (male)
Comport 2 (female)
2 = RXD
2 = TXD
3 = TXD
3 = RXD
5 = GND
5 = GND
9 = DC 5V Output
Nil